Public Transport Accessibility Level (PTAL)

The Public Transport Accessibility Level (PTAL) gives a synthetic measure of the access to public transport.
The PTAL values range from 1 to 6, with sub-division. A value of 1 indicates poor access to public transport, whereas a value of 6b indicates very good access.

How was PTAL created?

PTAL is calculated taking in account different variables like the walking distance from any bus stop and rail station and the service level during peak times.

Where can I find out more?

PTAL on wikipedia

How PTAL works

Transport for London